Rotary printing machine



Feb. 14, 19349; K; T. LANG I 2,146,963

A ROTARY PRINTING- MACHINE Filed May 20, 1956 4 Sheets-Sheet -l Feb. 14,1939. K. T. LANG ROTARY PRINTING MACHINE Filed May 20, 193 4Sheets-Sheet 2 M fmay 5M.

Feb. 14, 193 9. Y T, LANG I I 2,146,963

ROTARY PRINTING MACHINE Filed May 20, 1936 4 Sheets-Sheet 3 Feb.-14,1939. K. T. LANG 2,146,963

ROTARY PRINTING MACHINE Filed May 20, 1936 4 Sheets-Sheet 4 fgaaPatented Feb. 14, 1939 UNITED STATES ROTARY PRINTING. MACHINE KarlTheodor Lang, Coswig-Dresden, Germany,

assignor to Dres'den-Leipziger Schnellpressen- Fabrik A. G., Coswig,Germany Application May 20,

1936, Serial No. 80,775

'In Germany May-22, 1935 8 Claims.

This invention relates to cylinder-mountings in rotary printingmachines.

In machines of this class it is often necessary to'exchange the intagliocylinder and to replace it by another intaglio cylinder having only halfthe diameter of the first. Furthermore, the arrangement of the cylindersmust be such as to permit starting and stopping of impression and alsofine adjustment thereof. The cylinder bearings must be displaced to thenecessary extent without any dimculty. Various bearing constructions areknown already which permit starting, stopping, fine adjustment of theimpression, etc, but adjustment is always controlled by a separate gearwith the result that these constructions are too complex and difficultto handle. Most of these constructions further require removal andreinsertion of the cylinder bearings. 2 The invention completelyeliminates the drawbacks of the known constructions by providing in themachine frame guides for holding means which receive the cylinderbearings. These holding means are articulated to a suitable toggletrier-provided for influencing the toggle to permit starting andstopping and fine'adjustment of the impression as well as the necessarydisplacement of the bearing holding means for removing the cylindexs andexchanging them for cylinders having only one-half their diameter.

The means for starting and throwing off im-- pression preferablycomprisean adjusting mechanism acting on the fulcrum of the toggle and held inpositionby suitable means. for changing the holding means from holdingcylinders of standard diameter to holding intaglio cylinders having onlyhalf thi'sdiameter. or vice versa, are formed-of a crank which isadjustable to the extent of 180 and engaged by the free end of thetoggle. Instead of the crank an eccentric gear may be provided. For fineadjustment of impression a fine adjusting mechanism cooperating with thetoggle may be provided and constructed as eccentric gear.

By way of example, the invention is illustrated in the accompanyingdrawings, in which Figure l is a front view of thecylinder. arrangementprovided with the necessary adjusting means, parts of the machine framebeingbroken away; Fig. 2 is a similar view, but with the impressionthrown off; Fig. 3 is a view similar to those shown in Figs. 1 and 2,and shows how the intaglio cylinstandard intaglio cylinder an intagliocylinder for displacing the bearings, and means are fur- The means a deris rolled out; Fig. 4 shows how instead of a having only half thediameter of the former is inserted; and Fig. 5 is a side view of Fig. 1,partly in section.

Referring to the drawings, in the side walls I of the machine framebearing holding means 3 are displaceably disposed in a vertical guide 2.The holding means 3 extend with their portion 4 between the walls of theframe and thus form a support for the bearing members 5 attached to theends 6 of the shaft of the intaglio cylinder 1. As indicated in Fig. 5,the shaft of the intaglio cylinder 1 is shorter than the clear widthbetween the frame walls; on the face of the shaft end 6 coupling claws 8are provided. In the holder 3 a hollow bushing 9 is rotatably disposedand carries outside the machine frame a gear I0. On the face of thebushing 9 facing the shaft end 6 coupling claws II are arranged whichcooperate with the claws 8 of the shaft end 6. An adjusting screw i3disposed in a threaded hole l2 of the member 6 effects con- 'nectio n ofthe claws 8, II and thereby of the intaglio cylinder 1 and drive Iii.

Above the intaglio cylinder I a shaft H, which is stationary in theexample shown, carries the impression cylinder l5 whichcan bedisplaceable by means of a suitable adjusting gear for starting,stoppingor fine adjustment of the impression.

Within the frame walls and slightly below the bearing members 5 railsiii are provided to serve as path for rolling the intaglio cylinder Iout of the machine.

- A link pin ll arranged in the lower part-of the holder 3 is engaged bythe adjusting gear comprising, in the embodiment shown, the levers l8and I9 which are articulated to' one another by the hinge bolt 20. Thepairs of levers l8, l9 form with the appurtenant joints a toggle, thelower pair of levers I9 being supported by the crank pins 2i disposed onthe faces of a rollerlike member 22 which by means of an interposedeccentrically bored bushing 23 is positioned in an enlarged portion 24of the frame walls I.

The eccentric bushing 23 is fitted on its circumference with the wormwheel 25 which is engaged by a worm 26 arranged in the enlarged portion24. The worm 26 is carried by a shaft 2-1 which can be turned by anadjusting wheel 28.

One of the crank pins 2| is firmly engaged by a crank 29 which in thecenter of the roller like member 22 carries a rotary shaft 30. By meansof an adjusting mechanism, not shown, the roller-like member 22 can beturned 180 when the shaft 30 is rotated. The adjusting 'down still more.

mechanism also secures the roller-like member 22 in position when thebushing 23 isturned. Laterally of the .enlarged portion 24 a pin 3| onthe inside of thewall I carries an adjust-- ing lever 32 which by meansof a connecting rod 33 flexibly engages the link pin 20 of thetoggle l8,l9. By means of a suitable mechanism the lever 32 is brought into thepositions I, II, III, as indicated in Fig. 1. In the position I thetoggle levers l8, l9 are extended and the intaglio cylinder 1 is liftedso as to hug the impression cylinder I5. Fine adjustment between the twocylinders I and I can be effected by dis-1 placing the toggle while inextended position by actuating the adjusting wheel 28, so that by meansof the worm 2B and of the worm wheel 25 the eccentric bushing 23 isturned in the enlarged portion 24 and the roller-like member 22 on whichthe member l9 rests is raised or lowered. This adjustment is extremelyaccurate and sensitive.

When the impression is to be thrown ofl, the lever 32 must be broughtinto the position 11, which involves inward bending of the toggle, sothat the parts are in the position shown in Fig. 2. To secure the togglein this position a reversible cam disc 35 is disposed on a level withthe link pin 20 on a pin 34, which in the position according to Fig. 2hugs with its high portion-the toggleparts and secures them in position.The cylnders I and I! are now moved apart to the extent of the distancea, i. e.', impression'is thrown off. To start impression again the lever32 is brought in the position I.

To roll the intaglio cylinder 1 out of the machine the holders in theguides 2 must be drawn For this purpose the adjusting lever 32 must beplaced in the position III according to Fig. 3. Previously, the cam disc35 must be turned 180 to cause the toggle levers to rest on the lowerportion of the disc 35. During depression of the holders 3 the engravingcylinder 1 is lowered to such an extent that the bearings 5 rest on therails l6, as clearly indicated in Fig. 3. During further motion of theholders 3 the portions 4 thereof finally release the bearing members 5,and the intaglio cylinder can be rolled out of the machine on the pathl6.

Instead of the cylinder I of standard or full diameter a cylinder 36. ofhalf this diameter (Fig. 4) may be inserted. The cylinder 36 possessessimilar bearing parts 5 and is rolled in extent that the smallercylinder 36 will be adjacent to the impression cylinder IS in the samemanner as formerly the larger cylinder 1. Fine adjustment as well asstarting and stopping of impression is effected in the manner described.I claim: 1. Rotary printing machine, comprising a frame, rotarycylinders arranged in said frame, shafts and bearing holding means forstarting having only half the diameter thereof comprise an adjustingmechanism of the toggle.

3. Rotary printing machine according to claim 1, wherein the means foreffecting fine adjustment of impression and the means for initiating theexchange of standard cylinders for cylinders having only half thediameter thereof comprise engaging the fulcrum an adjusting mechanismengaging the fulcrum.

of the toggle and means for fixing the adjusting mechanism in differentoperating positions.

4. Rotary printing machine according to claim 1, wherein the means foradjusting the holding means for exchanging standard cylinders forcylinders having half the diameter thereof comprise a roller-like membercapable of being reversed 180" and crank pins disposed on saidroller-like member and engaged by the free end of the tog le.

5. Rotary printing machine according to claim 1, wherein the means foradjusting impression comprise a fine adjusting mechanism cooperatingwith the toggle.

6. Rotary printing machine according to claim 1,' wherein the means foradjusting impression comprise a fine adjusting mechanism constructed asa gear having an eccentric opening and cooperating with the toggle.

7. Rotary printing machine according to claim 1, wherein the means foradjusting impression comprise a fine adjusting mechanism engaging thelower free end of the toggle.

8. Rotary printing machine, comprising a frame provided with walls, animpression cylinder arranged in the frame, an intaglio cylinder, a

shaft for the intaglio cylinder, said shaft being shorter than the clearwidth between the frame walls, bushings on the ends of said shaft,holdingmeans for supporting the bushings, guides in the frame walls forsaid holding means, two toggle levers for flexibly engaging said holdingmeans, a crank in the lower part of the frame, crank pins 'on the crankon which the ends of the toggle levers rest, an eccentric bushingsurrounding the crank and being interposed between the bearing and thecrank, an adjusting mechanism for the eccentric bushing, a toggleoperating mechanism arranged on the frame walls and engaging the fulcrumof the toggle levers to cause inward bending of same to start andstop-impression and, during further bending, to permit rolling out ofthe intaglio cylinder, said eccentric bushing causing fine adjustmentof. impression when turned while actuation of said crank effectsadjustment of said holding means for the .reception of standard orhalfdiameter cylinders.

' KARL 'rnnopon LANG.

